window.onload=()=>{
    let itemsDom = document.getElementById('items'),
    submitBtn = document.getElementById('submit');

    submitBtn.onclick=(e)=>{
        let item = document.getElementById('input');
        fetch('http://192.168.18.144:8080/todo', {method: 'POST', body: 'item='+item.value}) 

        .then(res => { res.text().then(txt => console.log(txt)) });
    }
    fetch('http://192.168.18.144:8080/todo')
    .then(res => { 
        res.text()
        .then(
            txt => {
                let items = JSON.parse(txt).data;
                itemsDom.innerHTML = items.map(item=>'<li>'+item+'<li>');
                alert(items);
                console.log(txt)
                }
            ) 
        }
    );
}

